Watch.



E.H.HORN. WATCH.

APPLICATION FILED NOV. 25, 1907.

926,329, Patented June 29, 1909.

ERNEST H. HORN, OF WATERBURY, CONNECTICUT, ASSIGNOR TO THE WATERBURY CLOCK CO., OF WATERBURY, CONNECTICUT, A CORPORATION.

WATCH.

Specification of Letters Patent. Application .filed November 25, 1907.

Patented June 29, 1909. Serial No. 403,710.

To all whom it may concern:

Be it known that I, ERNEST H. HORN, a citizen of the United States, residing at Wa terbury, in the county of New Haven and State of Connecticut, have invented a new and useful Im rovement in Watches; and I do hereby dec are the following, when taken in connection with the accompanying drawlugs and the characters of reference marked thereon, to be afull, clear, and exact description of the same, and which said drawings constitute part of'this specification, and represent, in Figure 1 a view in watch front elevation of a constructed in accordance with my invention, with the face of the case removed.

Fig. 2 a broken view of the watch partly in front elevation and partly in vertical section, a portion of the front movement-pla te being broken away. Fig. 3 a detached view in side elevation of my improved one-piece crown stem. Fig. 4 a reverse plan view thereof. Fig. 5 a detached view in side elevation of the winding and setting stem, with the settingwheel-and the winding ratchet mounted upon it. Fig. 6a reverse plan view showing the lower end of the winding and setting stem and the lower face of the winding ratchet, the stem being upset to retain the ratchet in place and to form a bearing surface of small area for contact with the winding-and-setting stem spring. Fig. 7 a

sectional view on the line a-b of Fig. 5

looking upward and showing how the winding ratchet is loosely mounted u on the squared lower end of the winding-an -setting stem. Fig. 8 a detached reverse plan view of the bridge from which the winding-andsetting stem has been removed to show the winding pinion the lower face of which is formed with teeth for engagement by the winding ratchet. Fig. 9 a view of the same parts in vertical central section on the line cd of Fig. 8.

My invention relates to an improvement in stem-winding and stem-setting watches, the object being-to reduce the number of parts to the minimum and to secure for the winding and setting functions of a cheap watch, the smoothness and quietness of operation characteristic of the winding and setting functions of watches of high grade.

With these ends in view, 'my invention consists in a watch having certain details of construction and combinations of parts as the head 12. At

will be hereinafter described and pointed out in the claims.

In carrying out my invention as herein shown, I employ a one-piece crown stem consisting of a body 2 having its upper end '60 lower end of the pendant 8 and limits the outward movement of the stem and prevents it from being pulled out of the said pendant which is formed with a chamber 9 for the reception of a s ring lOencirclingthe body 2 of the stem an exer'tinga constant effort" to lift the stem and it's crown into their normal positions in which they are shown in Fig. 2.

The driving edge 5 enters a slot 11' extending diametrically across a coupling head 12 formed integral with and located at the upper end of a winding-and-setting stem 13 which, though made independent of the sion thereof.

In many watches, particularly those of high grade, the winding and setting stem is made in one piece and not, as it were, broken into two pieces coupled together as in the 8 construction now being described. My improved crown-stem 2 belng made in one piece is simple, durable, cheap andnot liable to derangement.

The winding'and-setting stem 13 is formed 9 just below its slotted coupling head 12 with a shoulder 14 upon which the setting-wheel 15 is staked, the upper face of this wheel being brought to a bearing upon the lower face of is squared as-at 16 for the reception of a winding ratchet 17 which is formed with a square hole 18 just enough larger than the squared portion 16 of the stem to permit the ratchet to have a slight spect to the stem 13 the rotation of which, however, it must partake. Furthermore the squared. portion 16 is made a trifle longer than the depth of the-ratchet 17 to provide for a slight upward and downward move- 105 ment of the ratchet Withrespectto the stem 13. In this Way the ratchet is nonrotata'bly mounted upon the stem 13- and at the same time 'made loose enough .or Ifiexible enough in its connection therewith to permit its The retain- 65 mg flange 4 enters a counter-bore 7- in the,

crown-stem 2, constitutesa virtualeXten-BO its lower end, the stem 13 rotary movement with reratchet teeth 18 to accommodate themselves readily and slide into and out of engagement with the minimum of jar and friction with the face teeth 19 formed upon the lower face of the winding inion 20 which is mounted so as to turn free y inlthe bridge 21 the upper face of the pinion 20 being formed with a sleeve 22 which projects upward throughthe bridge as shown in Fig. 9; The central bore 24 of the pinion 20 receives the winding-and-setting stem'13 which is free to move up and down, as well as to rotate within the pinion 20. For securing the ratchet 17 upon the squared portion 16 of the stem 13, the projecting lower end of the squared portion 16 is upset to form the retaining head 25 while to provide a bearing of small area for the winding-and-setting-stem spring 26 the central portion of the head 25 is raised to form a small contact surface 27 which reduces the frictional-area for engagement by the spring 26, to the minimum;

The operation of watchesof the type being described is so well understood that it will be sufficient for me to state that the springs 10 and 26 normally maintain the stems 2 and 13 at the limit of their outward movement at which time the winding ratchet 17 couples both stems with the winding pinion 20 which is always in mesh with the intermediate winding wheel 28 which in turn is always in mesh with the main winding wheel 29. When, 'liowever, the stems 2 and 13 are crowded inward against the tension of the springs 10 and 26 by pressure upon the crown 6, the teeth 18 of the winding ratchet 17 are forced out of engagement with theteeth 19 of the winding pinion 20 so as'to move the setting wheel 15 inward into engagement with the dial wheel 30 which in turn meshes into the dial wheel 31 of the dial work.

By making the crown stem 2 in one piece the number of parts and the number of operations is reduced, and a simpler, more durable and more reliable device secured, while by loosely mounting the ratchet 17 upon the winding-and-setting stem the ratchet is made self accommodating so to speak, whereby noise and wear are reduced.

1. In a vstern-winding and stem-setting watch, the combination with the pendant thereof, of a one-piece crown-stem located therein, projecting at its threaded outer end therefrom, formed at its inner end with an annular retaining-flange coacting with the inner end of the pendant and also formed with a driving-edge projecting from the center of the inner face of the said flange; a crown applied to the threaded projecting outer end of the said stem, an independently formed winding-and-setting stem adapted at its outer end to receive the said driving-edge ol the crown-stem, a setting-wheel fixed upon p the outer end of the ,winding-andsetting stem, and a winding ratchet loosely mounted upon the inner end of the said winding-and}.

plied to the threaded projecting outer end of the said stem, an independently formed winding-and-setting stern having atits outer end a-slotted coupling-head for the reception of the said driving-edge, a setting wheel fixed to the windingand-setting stem'and bearing against the lower face of the said couplinghead, a -winding-ratchet loosely mounted upon the inner end .of the said stem, and,

means exerting a constant effort to move the two stems outward.

3. In a. stem-winding andstem-setting watch, the combination with the pendant thereof, of a crown-stemlocated therein and projecting outward therefrom,- formed at-itsinnerend with an annular retaining-flange engaging with the inner-end of the saidpendant,

and also formed with a driving edge depending from the center of the inner face of the said flange, a crown applied to the projecting outer end of the said crown-stem, an independently formed winding-and-setting stem adapted at itsouter endto-receivc the said driving-edge, a setting-wheel rigidly secured to the outer end ofjthe,winding and setting stem, a winding rat'chet loosely-mounted upon the inner end of the said winding-and settingstem, a bridge, a winding-pinion mounted to turn looselytherem. and carrymg face-teeth coacting with the said windingumen, and a spring engaging with the extreme inner end of the winding-and-settmg stem for moving the two stems outward.

4. Ina stem-winding and stem-setting watch, the combination with a crown stem,-

of a winding-and-setting stem made inde-= I pendent thereof but normally'coupled therewith and havin its lower portion squared and its extreme lower end formed with a retaining-head having a bearing-surface, a

spring bearing upon the said surface and ex erting a constant effort to move thetwo stems outward, and a winding ratchet mounted upon the squared portion, of the winding-and-setting stem. t

In testimony whereof, I have signed: this specification in the presence of two subscribe ing witnesses. 1 v

- ERNEST H. HORN Witnesses:

v S. M. BUTCHER,

D. W. LYoNs.- 

